12.5sq ft total, 23 plants occupying the space. That's .54sq ft per plant. 10.76 sq ft per sq meter. 41.4g average harvest per plant currently, at 19.9 per square meter that's 823g/m2, current average of 76.5 days seed to harvest, 10.75g/m2/day.
I'm no expert grower, I see deficiencies, stunt some with over feedings. But autos yield pretty massive considering they can soak in 24/0 lighting. With 482w of cobs per m2, it's only .93g/kwh. Big old sq meter numbers, low electrical efficiency. I can pay an extra $50 in lighting a cycle, I can't add more space. Just need more meds.